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dc.contributor.author
Amás, Juan Ignacio
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dc.contributor.author
Curin, Facundo
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dc.contributor.author
D'andrea, Karina Elizabeth
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dc.contributor.author
Luque, Sergio Fernando
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dc.contributor.author
Otegui, Maria Elena
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dc.date.available
2024-08-14T11:18:30Z
dc.date.issued
2024-08
dc.identifier.citation
Amás, Juan Ignacio; Curin, Facundo; D'andrea, Karina Elizabeth; Luque, Sergio Fernando; Otegui, Maria Elena; Maize breeding effects on grain yield genetic progress and its contribution to global yield gain in Argentina; Elsevier Science; Field Crops Research; 316; 8-2024; 1-11
dc.identifier.issn
0378-4290
dc.identifier.uri
http://hdl.handle.net/11336/242462
dc.description.abstract
Context or problem: Maize production in Argentina has increased in recent years, following the global gain (GG) in grain yield (GY). The GG in GY depends on genetic progress (GP), which requires frequent quantification to detect potential plateaus and variations in its contribution to the GG. In this sense, hybrid adoption in Argentina shifted from double- and three-way to single cross (F1) hybrids in the 1990s, thereby increasing the level of heterosis of released hybrids. Since heterosis increase may have had a greater impact on estimates of maize GG than those based on a single cross type, GP based exclusively on F1 hybrids and its contribution to GG could be lower than that including different types of crosses. Objective or research question: The main objectives of this work were to (i) analyze grain yield GP, (ii) dissect grain yield GP into the corresponding trends in its physiological determinants and numerical components, and (iii) estimate the relative contribution of GP to GG in the main maize producing region of Argentina for the period marked by significant changes in heterosis level (i.e. from 1960s to 1990s) and the period of massive adoption ofF1 hybrids (from 1990s onwards). Methods: We used a dataset obtained at the core of the mentioned region (INTA Pergamino; 33◦56’S, 60◦34’W) from era-decade experiments (ERA) including 24 hybrids released between 1965 and 2016 and grown with no abiotic or biotic restrictions. We quantified GY, its numeric components (KN: kernel number m− 2, KW: individualkernel weight) and its physiological determinants (BT: total shoot biomass at maturity, HI: harvest index). Results: A GP of 0.84 % y− 1 was computed for GY from 1965 to 1993, and of 0.51 % y− 1 thereafter. We also detected genetic progress for KN (0.53 % y− 1 ) and BT (0.26 % y− 1) but not for KW. A GP of 0.66 % y− 1 was computed for HI up to 1993, which plateaued thereafter. A 40 % contribution of GP to GG was estimated for the Pergamino site from 1965 to 1993, predominantly driven by changes in heterosis level. The contribution dropped to 32 % from 1993 onwards, when F1 hybrids were massively adopted by the farmers. This contribution wasmuch smaller (e.g. 19 %) in areas less representative of the target population of environments of cominant breeding programs. Conclusions: Our findings underline that the relative contribution of GP to GY improvement at the regional level varies markedly depending upon the period included in the analysis and the environment used for evaluation.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Elsevier Science
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dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Heterosis
dc.subject
Target environment
dc.subject
Total shoot biomass
dc.subject
Harvest Index
dc.subject.classification
Agricultura
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dc.subject.classification
Agricultura, Silvicultura y Pesca
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dc.subject.classification
CIENCIAS AGRÍCOLAS
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dc.title
Maize breeding effects on grain yield genetic progress and its contribution to global yield gain in Argentina
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2024-08-13T12:26:34Z
dc.journal.volume
316
dc.journal.pagination
1-11
dc.journal.pais
Países Bajos
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dc.journal.ciudad
Amsterdam
dc.description.fil
Fil: Amás, Juan Ignacio. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Instituto Nacional de Tecnología Agropecuaria. Centro Regional Buenos Aires Norte. Estación Experimental Agropecuaria Pergamino; Argentina
dc.description.fil
Fil: Curin, Facundo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro de Investigaciones y Transferencia del Noroeste de la Provincia de Buenos Aires. Universidad Nacional del Noroeste de la Provincia de Buenos Aires. Centro de Investigaciones y Transferencia del Noroeste de la Provincia de Buenos Aires; Argentina
dc.description.fil
Fil: D'andrea, Karina Elizabeth. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura. Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura; Argentina. Universidad de Buenos Aires. Facultad de Agronomía. Departamento de Producción Vegetal; Argentina
dc.description.fil
Fil: Luque, Sergio Fernando. Universidad Nacional de Córdoba. Facultad de Ciencias Agropecuarias; Argentina
dc.description.fil
Fil: Otegui, Maria Elena. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Instituto Nacional de Tecnología Agropecuaria. Centro Regional Buenos Aires Norte. Estación Experimental Agropecuaria Pergamino; Argentina. Universidad de Buenos Aires. Facultad de Agronomía. Departamento de Producción Vegetal; Argentina
dc.journal.title
Field Crops Research
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://linkinghub.elsevier.com/retrieve/pii/S0378429024002739
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/https://doi.org/10.1016/j.fcr.2024.109520
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